Time Dependent Wear and Its Mechanisms in Engine Cylinders
Abstract
This contract is a joint effort between the Center for Automotive Research at Wayne State University and Ford Motor Company, with a goal of reducing the, testing time of wear in the cylinder bore of reciprocating combustion engines. This is accomplished by developing a new probe to determine the in-situ wear in the liner at the top ring reversal point in an engine under actual running conditions without the need to disassemble the engine. The wear probe is then utilised to measure the wear and surface roughness at several intervals during and after the break-in period. A 3-D surface topography of a predesignated area on the wear probe is obtained before and after a wear test is made. The volume of the topography above a common reference plane is calculated. The decrease in the volume due to wear is measured, and the average nominal wear depth is calculated over the whole area. In addition to wear-measurements, the total instantaneous engine frictional torque is measured. Correlations are developed between the rate of change in wear, surface roughness and engine friction. This correlation is used to predict the effect of varying the surface properties on wear rate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1997
- Accession Number
- ADA578672
Entities
People
- Naeim A. Henein
Organizations
- Wayne State University